package com.javalearn.gulimail.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.javalearn.common.constant.AuthServerConstant;
import com.javalearn.common.exception.BaseCodeEnume;
import com.javalearn.common.utils.R;
import com.javalearn.common.vo.MemberResponseVo;
import com.javalearn.gulimail.auth.feign.MemberFeignService;
import com.javalearn.gulimail.auth.feign.ThirdPartFeignService;
import com.javalearn.gulimail.auth.vo.UserLoginVo;
import com.javalearn.gulimail.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.bind.BindResult;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {
    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate stringRedisTemplate;

    @Autowired
    MemberFeignService memberFeignService;
    /**
     * 发送一个请求，直接跳转到一个页面，其他的什么都不做
     * 使用springmvc 的 viewController，将请求和页面映射过来
     * @return
     */

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //TODO 接口防刷

        //发送验证码前要判断离当前时间有没有超过60s
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l<60000){
                //60秒内不能再发
                return R.error(BaseCodeEnume.SMS_CODE_EXCEPTION.getCode(), BaseCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }


        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+"_"+System.currentTimeMillis();

        //1.验证码的再次校验 redis 存key：sms:code:手机号 value-code
        //redis缓存验证码，防止同一个手机号60s内再次发送验证码
        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,subString,10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone,code);
        System.out.println("发送验证码的手机："+phone +"  验证码："+code);
        return R.ok();
    }


    //TODO 重定向携带数据，将数据放在session中，只要跳到下一个页面取出数据后，session中的数据就会删掉
    //TODO 分布式下session的问题
    @PostMapping("/regist")
    //redirectAttributes:重定向携带数据，重定向的话model会失效
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if (result.hasErrors()){
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.gulimail.com/reg.html";
        }

        //1.校验验证码
        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码，令牌机制
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过,真正的注册
                R r = memberFeignService.regist(vo);
                if (r.getCode()==0){
                    return "redirect:http://auth.gulimail.com/login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimail.com/reg.html";
                }

            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimail.com/reg.html";
            }
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.gulimail.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode()==0){
            //成功，放到session中
            MemberResponseVo data = login.getData("data", new TypeReference<MemberResponseVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimail.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            //失败
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimail.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute==null){
            //没登录
            return "login";
        }else {
            return "redirect:http://gulimail.com";
        }
    }
}
